Covid-19 pandemic strikes all over the world. With a view to tackling this pandemic, a wide range of unprecedented fundamental right intrusive measures, such as large-scale lock down, electronic tracking without court decision, medical devise rationing measures, etc., have been adopted and implemented. Despite the effectiveness of these measures in preventing further virus spreading, the concerns of violation of constitution law concerns would be raised after the pandemic has eased. Taiwan performed very well in tackling covid-19 from the record of 253 days without local confirmed cases in 2020 and the only 16250 confirmed cases by 4 October 2021. However, success in avoiding virus spreading may not mean the legal measures play key role. Also, if the law does play roles, it is also possible that these measures could not pass the unconstitutional tests. In order to provide a structural analysis of the related fundamental right intrusive measures, this article will begin with the introduction of the main laws and “guidelines” in combating COVID-19. Afterwards, a critical review will be provided to investigate into the institutional failure and the unconstitutional concerns from the measures.